function like(btn,entityType,entityId) {
    $.post(
        CONTEXT_PATH+"/like",
        {
            "entityType":entityType,
            "entityId":entityId,
            function(data){
                data = $.parseJSON(data);
                if(data.code == 0){
                    $(btn).children("i").text(data.likeCount);
                    $(btn).children("b").text(data.likeStatus == 1 ? '已赞' : '赞')
                }else{
                    alert(data.msg);
                }
            }
        }
    );

}